[MCJIT] Fix a memory leak in a unit test that was introduced in r243589.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243609 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ExecutionEngine/MCJIT/MCJITCAPITest.cpp

@@ -505,6 +505,7 @@ TEST_F(MCJITCAPITest, addGlobalMapping) {
   LLVMPositionBuilderAtEnd(Builder, Entry);
   LLVMValueRef RetVal = LLVMBuildCall(Builder, MappedFn, NULL, 0, "");
   LLVMBuildRet(Builder, RetVal);
+  LLVMDisposeBuilder(Builder);
 
   LLVMVerifyModule(Module, LLVMAbortProcessAction, &Error);
   LLVMDisposeMessage(Error);